Sachio Hirokawa

article

Text mining of tourism preference in a multilingual site

Chao Zeng, Tetsuya Nakatoh, Sachio Hirokawa, Masanari Eguchi

IEEJ Transactions on Electrical and Electronic Engineering > 14 > 4 > 590 - 596

There is a huge demand on multilingual tourism information of Japan because of the increasing number of tourists from foreign countries. Most of them may expect typical and stereotyped culture, nature, and modern society of Japan. However, people from different backgrounds, cultures, and languages might expect different aspects of Japan, as well. In this paper, we analyze these kinds of differences...

article

Attribute-based quality classification of academic papers

Tetsuya Nakatoh, Sachio Hirokawa, Toshiro Minami, Takeshi Nanri, more

Artificial Life and Robotics > 2018 > 23 > 2 > 235-240

Investigating the relevant literature is very important for research activities. However, it is difficult to select the most appropriate and important academic papers from the enormous number of papers published annually. Researchers search paper databases by combining keywords, and then select papers to read using some evaluation measure—often, citation count. However, the citation count of recently...

chapter

A Multi-model SVR Approach to Estimating the CEFR Proficiency Level of Grammar Item Features

Brendan Flanagan, Sachio Hirokawa, Emiko Kaneko, Emi Izumi, more

2017 6th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI) > 521 - 526

2017 6th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI)

Analysis of publicly available language learning corpora can be useful for extracting characteristic features of learners from different proficiency levels. This can then be used to support language learning research and the creation of educational resources. In this paper, we classify the words and parts of speech of transcripts from different speaking proficiency levels found in the NICT-JLE corpus...

chapter

A Point-of-Interest Recommendation Method Using Location Similarity

Jun Zeng, Yinghua Li, Feng Li, Junhao Wen, more

2017 6th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI) > 436 - 440

2017 6th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI)

POI recommendation aims to recommend places which users have not visited before. In this paper, we proposed a POI recommendation method using location similarity, which assumes that people may be interested in the places that are similar with the places that they have been to before. In order to calculate the similarity of locations, we proposed a novel method using time slots. Every two hours can...

chapter

An Analysis of Characteristics of Student-Athletes from Questionnaire by SVM

Toru Sugihara, Soichiro Aihara, Sachio Hirokawa, Takashi Nara

2017 6th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI) > 163 - 166

2017 6th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI)

What sort of care should a university take for student-athletes? To answer the question and to consider the future educational strategy are one of big issues for many universities. The authors created a questionnaire which consists of 77 questions with multiple choice form. We collected the responses from 100 student-athletes and 141 other students. The present paper analyzed the characteristic features...

chapter

Who is the Last Author of Your Paper?

Kumiko Kanekawa, Tetsuya Nakatoh, Takahiko Suzuki, Sachio Hirokawa

2017 6th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI) > 221 - 224

2017 6th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI)

Evaluation of researchers is a big issue in institutional research. We propose a method for quantitatively evaluating the stage of young, middle and senior researchers focusing on the role of the last author in co-authored papers. We trace the two time series of the number of published papers and the ratio of the last authored papers among them of each researcher. We conducted experiments on 84 researchers...

chapter

Generation of Sentence Template Graph from SOAP Format Medical Documents

Naoya Onimura, Takanori Yamashita, Naoki Nakayama, Hidehisa Soejima, more

2016 International Conference on Computational Science and Computational Intelligence (CSCI) > 159 - 162

2016 International Conference on Computational Science and Computational Intelligence (CSCI)

Clinical pathways are a fixed list of viewpoints todescribe patients' condition. An outcome of a clinical pathwayconsists of several assessments of observation items andinspection items, all of which represented as numerical data. Onthe other hand, free description medical records in the SOAPformat are valuable data that indicate health care worker'sassessments. Standardization of textual description...

chapter

Difficulty of words and their ambiguity estimated from the result of word sense disambiguation

Takahiko Suzuki, Koki Miyata, Sachio Hirokawa

2016 11th International Conference on Knowledge, Information and Creativity Support Systems (KICSS) > 1 - 5

2016 11th International Conference on Knowledge, Information and Creativity Support Systems (KICSS)

When learning a new word in language learning, there are two problems. One is how difficult the word itself is. The second is, in what kind of situation, it will be used. There is a research that defined quantitative ambiguity of words based on the structure of WordNet, then investigated the relationship between the ambiguity and the difficulty level of words. In this paper, we re-define ambiguity...

chapter

Functional Composition of Web Databases

Masao Mori, Tetsuya Nakatoh, Sachio Hirokawa

Lecture Notes in Computer Science > Digital Libraries: Achievements, Challenges and Opportunities > Information Organization > 439-448

This paper proposes the architecture of the functional composition of Web databases (WebDBs). Unlike a general search engine which receives keywords and returns a list of URLs, a WebDB receives a complex query and returns a list of records. The complex query specifies the condition of each field of the records. The process of composing WebDBs is described as a script, where a user chooses the target...

chapter

Semi-Automatic Construction of Metadata from a Series of Web Documents

Sachio Hirokawa, Eisuke Itoh, Tetsuhiro Miyahara

Lecture Notes in Computer Science > AI 2003: Advances in Artificial Intelligence > Language Understanding > 942-953

Metadata plays an important role in discovering, collecting, extracting and aggregating Web data. This paper proposes a method of constructing metadata for a specific topic. The method uses Web pages that are located in a site and are linked from a listing page. Web pages of recipes, real estates, used cars, hotels and syllabi are typical examples of such pages. We call them a series of Web documents...

chapter

Bibliometric Search with Focused Citation Ratios

Tetsuya Nakatoh, Hayato Nakanishi, Toshiro Minami, Kensuke Baba, more

2016 5th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI) > 150 - 153

2016 5th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI)

A survey of related work is an important task for every researcher, and databases of scientific articles are indispensable for this task. This paper proposes a new visualization method for search results and demonstrates a system that implements this method. Given a query, the system returns a list of articles and displays a time series of citation counts (CCs) for each article. The novelty of the...

chapter

Feature Words of Moves in Scientific Abstracts

Kiyota Hashimoto, Tasanawan Soonklang, Sachio Hirokawa

2016 5th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI) > 144 - 149

2016 5th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI)

Extraction of structure from texts is a key issue of text mining. The rhetorical structure of move in scientific articles is useful for assisting in the reading and writing. In this paper, we classify move structure in the abstract of research articles with a small number of characteristic words that determine five moves of including background (B), purpose(P), method(M), result(R) and discussion(D)...

chapter

Automatic Extraction and Prediction of Word Order Errors from Language Learning SNS

Brendan Flanagan, Sachio Hirokawa

2016 5th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI) > 292 - 295

2016 5th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI)

Recent research into writing tools to support foreign language learners of English has focused on prevalent errors in learner writing, while other errors, such as word order errors, have received little attention. As the word order of some languages are similar, there are also large differences between languages which can affect foreign language learning. In this paper, we automatically extract corrected...

chapter

A Restaurant Recommender System Based on User Preference and Location in Mobile Environment

Jun Zeng, Feng Li, Haiyang Liu, Junhao Wen, more

2016 5th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI) > 55 - 60

2016 5th IIAI International Congress on Advanced Applied Informatics (IIAI-AAI)

Recommender system is an effective way to help users to obtain the personalized and useful information. However, due to complexity and dynamic, the traditional recommender system cannot work well in mobile environment. In this paper, we propose a restaurant recommender system in mobile environment. This recommender system adopts a user preference model by using the features of user's visited restaurants,...

chapter

Extraction of Tag Tree Patterns with Contractible Variables from Irregular Semistructured Data

Tetsuhiro Miyahara, Yusuke Suzuki, Takayoshi Shoudai, Tomoyuki Uchida, more

Lecture Notes in Computer Science > Advances in Knowledge Discovery and Data Mining > Data Analysis > 430-436

Information Extraction from semistructured data becomes more and more important. In order to extract meaningful or interesting contents from semistructured data, we need to extract common structured patterns from semistructured data. Many semistructured data have irregularities such as missing or erroneous data. A tag tree pattern is an edge labeled tree with ordered children which has tree structures...

chapter

Principal type-schemes of BCI-lambda-terms

Sachio Hirokawa

Lecture Notes in Computer Science > Theoretical Aspects of Computer Software > 633-650

A BCI-λ-term is a λ-term in which each variable occurs exactly once. It represents a proof figure for implicational formula provable in linear logic. A principal type-scheme is a most general type to the term with respect to substitution. The notion of “relevance relation” is introduced for type-variables in a type. Intuitively an occurrence of a type-variable b is relevant to other occurrence of...

chapter

Eliminating Useless Parts in Semi-structured Documents Using Alternation Counts

Daisuke Ikeda, Yasuhiro Yamada, Sachio Hirokawa

Lecture Notes in Computer Science > Discovery Science > Regular Papers > 113-127

We propose a preprocessing method for Web mining which, given semi-structured documents with the same structure and style, distinguishes useless parts and non-useless parts in each document without any knowledge on the documents. It is based on a simple idea that any n-gram is useless if it appears frequently. To decide an appropriate pair of length n and frequency a, we introduce a new statistic...

chapter

Time Series Analysis of R&D Team Using Patent Information

Yurie Iino, Sachio Hirokawa

Lecture Notes in Computer Science > Knowledge-Based and Intelligent Information and Engineering Systems > Social Networks > 464-471

Reliable real data is indispensable for the examination, evaluation and the improvement of the organizational structure. This paper proposes a method to use patent documents for analyzing organizational structure of researchers. The method is more efficient and objective compared to personal interview. The structure of research groups is modeled as a “inventors graph”, which is a directed graph where...

chapter

Extracting Positive and Negative Keywords for Web Communities

Daisuke Ikeda, Sachio Hirokawa

Lecture Notes in Computer Science > Discovery Science > Poster Papers > 299-303

The linkage information is shown to be useful to find goodWeb pages at a search engine [5],[10]. But, in general, a search result contains several topics. Clustering Web pages enables a user to browse them easily. There are several works on clustering Web pages [7,10-12]. In [9], we visualizedWeb graphs using spring model. But clustering is not enough to understand the topics of the clusters. Extraction...

chapter

SCOOP: A Record Extractor without Knowledge on Input

Yasuhiro Yamada, Daisuke Ikeda, Sachio Hirokawa

Lecture Notes in Computer Science > Discovery Science > Poster Papers > 482-487

We present a record extractor system SCOOP. We assume that semi-structured documents given to SCOOP contain similar formats and each of them has only a record consisting of some different fields. SCOOP treats a document as just a string and does not use knowledge on input except that a field is surrounded with delimiters, a left delimiter ends with “>”, and the corresponding right delimiter begins...

INFONA - science communication portal

Search results for: Sachio Hirokawa

Text mining of tourism preference in a multilingual site

Attribute-based quality classification of academic papers

A Multi-model SVR Approach to Estimating the CEFR Proficiency Level of Grammar Item Features

A Point-of-Interest Recommendation Method Using Location Similarity

An Analysis of Characteristics of Student-Athletes from Questionnaire by SVM

Who is the Last Author of Your Paper?

Generation of Sentence Template Graph from SOAP Format Medical Documents

Difficulty of words and their ambiguity estimated from the result of word sense disambiguation

Functional Composition of Web Databases

Semi-Automatic Construction of Metadata from a Series of Web Documents

Bibliometric Search with Focused Citation Ratios

Feature Words of Moves in Scientific Abstracts

Automatic Extraction and Prediction of Word Order Errors from Language Learning SNS

A Restaurant Recommender System Based on User Preference and Location in Mobile Environment

Extraction of Tag Tree Patterns with Contractible Variables from Irregular Semistructured Data

Principal type-schemes of BCI-lambda-terms

Eliminating Useless Parts in Semi-structured Documents Using Alternation Counts

Time Series Analysis of R&D Team Using Patent Information

Extracting Positive and Negative Keywords for Web Communities

SCOOP: A Record Extractor without Knowledge on Input

Filter options

Publication date

Publication type

Keywords

Data set

Journal

INFONA - science communication portal

Search results for: Sachio Hirokawa

Add recipient

Sending message cancelled

Are you sure you want to cancel sending this message?

Send message

Filter options

Publication date

Date range setting

Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.

Publication type

Keywords

Data set

Journal

Reporting an error / abuse

Sending the report failed

Accessibility options